There are total 18 hours or 1080 minutes from 7am to 1am. In words, this duration is equal to eighteen hours or one thousand eighty minutes.
How many hours from
| 10PM to 9PM | 1PM to 6AM | 3AM to 11PM |
| 6PM to 7AM | 1AM to 2AM | 3PM to 4PM |
| 8PM to 12PM | 7PM to 6AM | 9AM to 7PM |
| 1PM to 4AM | 3PM to 5PM | 11PM to 7AM |
| 8PM to 6PM | 11PM to 4PM | 5AM to 8AM |
| 3PM to 9PM | 9PM to 9AM | 5PM to 9AM |
